Trails by state
| State | Trails | km | miles |
|---|
| Alabama | 35 | 309 | 192 |
| Alaska | 16 | 65.9 | 40.9 |
| Arizona | 42 | 496 | 308 |
| Arkansas | 95 | 345 | 214 |
| California | 341 | 2,306 | 1,433 |
| Colorado | 305 | 2,348 | 1,459 |
| Connecticut | 50 | 410 | 255 |
| Delaware | 20 | 85.0 | 52.8 |
| District of Columbia | 18 | 440 | 273 |
| Florida | 217 | 2,062 | 1,281 |
| Georgia | 95 | 732 | 455 |
| Hawaii | 14 | 33.0 | 20.5 |
| Idaho | 42 | 1,060 | 658 |
| Illinois | 238 | 2,684 | 1,668 |
| Indiana | 118 | 1,228 | 763 |
| Iowa | 226 | 2,375 | 1,475 |
| Kansas | 63 | 938 | 583 |
| Kentucky | 31 | 365 | 227 |
| Louisiana | 11 | 177 | 110 |
| Maine | 101 | 974 | 605 |
| Maryland | 102 | 1,026 | 637 |
| Massachusetts | 121 | 700 | 435 |
| Michigan | 517 | 4,187 | 2,602 |
| Minnesota | 273 | 3,490 | 2,169 |
| Mississippi | 4 | 141 | 87.4 |
| Missouri | 103 | 1,366 | 849 |
| Montana | 53 | 300 | 186 |
| Nebraska | 75 | 1,148 | 713 |
| Nevada | 77 | 699 | 435 |
| New Hampshire | 110 | 773 | 480 |
| New Jersey | 106 | 953 | 592 |
| New Mexico | 40 | 186 | 116 |
| New York | 304 | 2,535 | 1,575 |
| North Carolina | 100 | 516 | 321 |
| North Dakota | 9 | 303 | 188 |
| Ohio | 173 | 2,436 | 1,514 |
| Oklahoma | 53 | 865 | 537 |
| Oregon | 150 | 1,164 | 723 |
| Pennsylvania | 378 | 3,311 | 2,057 |
| Rhode Island | 9 | 38.1 | 23.6 |
| South Carolina | 85 | 394 | 245 |
| South Dakota | 11 | 244 | 152 |
| Tennessee | 31 | 124 | 77.0 |
| Texas | 180 | 1,543 | 959 |
| Utah | 57 | 497 | 309 |
| Vermont | 32 | 346 | 215 |
| Virginia | 141 | 1,203 | 747 |
| Washington | 245 | 2,586 | 1,607 |
| West Virginia | 70 | 892 | 554 |
| Wisconsin | 307 | 3,855 | 2,395 |
| Wyoming | 10 | 107 | 66.2 |